Best Master cylinder

[Italianwagon]

Looks like my master cylinders leaking. What’s the best replacement or are there any upgrades? (87 v20 burb)
Thanks

 

[bucket]

The best upgrade is one that's not leaking, lol. Seriously though, with a stock brake system, a stock master cylinder is a good replacement. Occasionally a new rebuilt one will be bad right out of the box, but it's not common.